CCOMe-965
CCOMe-965 - Rev. First Edition: 1.0 - Last Edition: 3.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
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3.3.16
PEG (PCI Express Graphics x16) Connector
According to COM Express specifications, it is possible to expand the graphical capabilities of the board by using the
dedicated PCI Express Graphics x16 bus (PEG) interface, which can be accessed through a card edge connector type
TYCO p/n 2-1612163-4 or equivalent, with the pinout shown in the following table.
Please check the User Manual of the COM Express module used for details about the availability of these lanes.
Please be aware that PCI-e management on CCOMe-965 carrier board requires that the add-in card placed on this
slot manages the Hot Plug presence detect pins (B81/B48/B31/B17 and A1). More exactly, according to the PCI Express Card Electromechanical Specification
v3.0, it is required that these pins are tied together on the ADD-in Card (at least, it is needed that pin A1 is connected with one of the other pins, B17, B31, B48 or
B81).
In case that these pins are not tied together on the add-in card, then the carrier board will not acknowledge the presence of the card in the slot, and will not enable
the reference clock (and the add-in card will not work).
PCI Express Graphics x16 Slot- CN3
Description
Pin name
Pin nr.
Pin nr. Pin name
Description
+12V Power Rail
+12V_S
B1
A1
GND
Hot Plug presence detect (tied to GND)
+12V Power Rail
+12V_S
B2
A2
+12V_S
+12V Power Rail
+12V Power Rail
+12V_S
B3
A3
+12V_S
+12V Power Rail
Power Ground
GND
B4
A4
GND
Power Ground
SM Bus Clock line
SMB_CK
B5
A5
JTAG2
TCK, tied to GND with 4K7
Ω
resistor
SM Bus Data line
SMB_DAT
B6
A6
JTAG3
TDI, tied to +3.3V_S with 4K7
Ω
resistor
Power Ground
GND
B7
A7
JTAG4
Test Data Out, not connected
+3.3V Power Rail
+3.3V_S
B8
A8
JTAG5
TMS, tied to +3.3V_S with 4K7
Ω
resistor
TRST#, tied to GND with 4K7
Ω
resistor
JTAG1
B9
A9
+3.3V_S
+3.3V Power Rail
+3.3V Auxiliary Power Rail
+3.3V_A
B10
A10
+3.3V_S
+3.3V Power Rail
Wake signal for link reactivation
WAKE0#
B11
A11
PEG_RST#
Reset signal to the add-in card
Not Connected
RSVD
B12
A12
GND
Power Ground
Power Ground
GND
B13
A13
PC
PCI-e Graphics reference clock lane +
PCI-e Graphics Transmitter lane 0+
B14
A14
PCIE_CLK0-
PCI-e Graphics reference clock lane -
PCI-e Graphics Transmitter lane 0-
PEG_TX0-
B15
A15
GND
Power Ground
Power Ground
GND
B16
A16
PCI-e Graphics Receiver lane 0+
